You are off to a great start. I don't say much about Avalon pres but they are very nice. The M5 is transformer balanced all class A discreet ... very nice stuff!
Any of the mics you mention would serve you well. Now the hard part, which one?
The ATM 4050 represents a great value. I love AT mics! Great build, good sound and excellent customer service. The Shure KSM44 has gained a good reputation in the short time it has been on the market. I see Allison Krauss and Union Station using the KSM series in live venues a lot.
I choose the old standby the AKG 414 however.. No studio should be without at least one or two. The 414 offers an additional pattern as well (hypercardioid) for you to have in your bag of tricks. When recording vocal & guitar, this hyper tight pattern can help reduce leakage.
414's work great on a number of sources, drum overheads, toms, snare, hat (hypercardioid pattern is wonderful for this), acoustic instruments, vocals, just about anything you can throw at it. I think you will be very satisfied with the AKG 414..
Thanks for asking !